I have said truck with 560k miles and it’s a 2016 with same engine, it’s got 450hp 2.64 rears and 10speed auto. I pull light loads usually round 55k and I average 7.2 mpg running balls to the walls 75mph. It outruns darn near anything up a hill with that weight but at 70k+ it’s a real struggle with the 2.64. The Jaír brakes are probably the best thing about the engine, they are insanely good. I can be loaded up to 65k going 65mph+ down a 6% grade and it will slow me down without having to press the brakes.
recently discovered the “sweet spot” some kind stranger taught me that it likes to run between 1300-1400 rpm and I’ve picked up a nice chunk of mpg round .5
i have put 60k miles on it this year and the only issue it has had is I needed to replace the clutch. Highly recommend it. You can’t beat the price of a prostar! And the turn radius is very good.
Windshield has a VERY tiny leak in extreme rain like 1 drop a minute on my dash. Doors aren’t tight and I get a lot of wind noise. Strange electrical problems that are too minor to care about like intermittent loss of the bunk mini led lights.